Initial provider implementation (#18)

This brings over the initial buildx prototype from pulumi/pulumi-docker
and fixes various build and release issues.

sdk/dotnet/Inputs/SSHArgs.cs

@@ -0,0 +1,48 @@
+// *** WARNING: this file was generated by pulumi. ***
+// *** Do not edit by hand unless you're certain you know what you are doing! ***
+
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Threading.Tasks;
+using Pulumi.Serialization;
+
+namespace Pulumi.DockerBuild.Inputs
+{
+
+    public sealed class SSHArgs : global::Pulumi.ResourceArgs
+    {
+        /// <summary>
+        /// Useful for distinguishing different servers that are part of the same
+        /// build.
+        /// 
+        /// A value of `default` is appropriate if only dealing with a single host.
+        /// </summary>
+        [Input("id", required: true)]
+        public Input<string> Id { get; set; } = null!;
+
+        [Input("paths")]
+        private InputList<string>? _paths;
+
+        /// <summary>
+        /// SSH agent socket or private keys to expose to the build under the given
+        /// identifier.
+        /// 
+        /// Defaults to `[$SSH_AUTH_SOCK]`.
+        /// 
+        /// Note that your keys are **not** automatically added when using an
+        /// agent. Run `ssh-add -l` locally to confirm which public keys are
+        /// visible to the agent; these will be exposed to your build.
+        /// </summary>
+        public InputList<string> Paths
+        {
+            get => _paths ?? (_paths = new InputList<string>());
+            set => _paths = value;
+        }
+
+        public SSHArgs()
+        {
+        }
+        public static new SSHArgs Empty => new SSHArgs();
+    }
+}